Scorpion's Sylvester is heading to the big house.

'Scorpion' Season 2: Walter's Injury Sidelines The Team, Mayhem Ensues; EP Teases Premiere

The human calculator and dedicated germophobe is the last person you'd expect Team Scorpion to send undercover in a prison, but Sly (Ari Stidham) will take on the "Fish Fillet" mission nonetheless.

Considering Sylvester's track record in the field (were looking at you Chaz Bonesteel), it won't be particularly surprising when the mission goes off the rails.

'Scorpion' Season 2 Spoilers: Does Paige Have Competition For Walter? Another Woman Arrives

"In order to save the lives of three judges, Sylvester goes undercover in a federal prison but Team Scorpion must break him out when his life is threatened," CBS said of the third episode.

Walter O'Brien (Elyes Gabel) and his fractured team will reunite once more this fall. Once the genius finishes healing from his season 1 cliffhanger, Homeland Security will look to reemploy Team Scorpion in order to save Southern California from a deadly explosion in "Satellite of Love." The series will then air "Cuba Libre" before moving on to "Fish Fillet," "Robots," and "Super Fun Guys."

Find out more when Scorpion returns to CBS on Sept. 21 at 9 p.m. ET. Click the video to see a preview for season 2.

Tags: scorpion television CBS